I have done some searching on the topic but want to address it directly. I have a 1974 3/4 ton on 37s with a 454 and th350/203 combo. This truck is never going to be a "hardcore" wheeler. I am building a "trail clean up truck" for clean up days and trail maint. My Jeep is the wheeler. With that said I would like to gain a little driveabilty from the truck by adding an OD trans. I will need to be able to hual and tow with it a bit. I am assuming that a 700R4 will fit my needs and maybe a 205? Is there another good option? What would be the best source for parts? Years? Trucks etc? Thanks.